Learning Wiki
Every big idea, made clear
Short, friendly explanations of 154 things children learn at school, from number bonds to photosynthesis. Each one has examples, a quick quiz and free practice.
- Explanations
- 154
- Quiz questions
- 636
- Subjects
- 7
- Ages covered
- 3–16
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What is photosynthesis?
Photosynthesis is how green plants make their own food. They use energy from sunlight to turn carbon dioxide from the air and water from the soil into sugar, giving out oxygen.
What is a fraction?
A fraction is part of a whole that has been split into equal parts. In ¾, the bottom number says how many equal parts and the top says how many you have.
What are number bonds?
Number bonds are pairs of numbers that add up to a given total, like 3 and 7 making 10. Knowing them by heart makes adding and subtracting much faster.
What are times tables?
Times tables are lists of the multiplication facts for a number, such as 3 × 1 = 3 up to 3 × 12 = 36. Knowing them by heart speeds up almost all later maths.
What is a fronted adverbial?
A fronted adverbial is a word, phrase or clause at the start of a sentence that tells how, when, where or why, followed by a comma, as in Later that night, the owl hooted.
What is place value?
Place value means a digit's value depends on its position in a number. In 352, the 3 is worth 300, the 5 is worth 50 and the 2 is worth 2.
What is the water cycle?
The water cycle is the endless movement of water between the land, the sea and the sky. Water evaporates, condenses into clouds, falls as rain or snow and collects in rivers and oceans.
What is the solar system?
The solar system is the Sun and everything that orbits it, including eight planets, their moons, dwarf planets such as Pluto, asteroids and comets.
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